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A system for adjusting the tip clearance and angle of attack of a hydrofoil in a water tunnel experiment

A technology of experimental water and blade tip clearance, which is applied in the fields of ocean ship engineering, water conservancy and hydropower engineering, can solve the problems of high experimental cost and complex structure, achieve the effect of easy disassembly and movement, simple and reliable sealing device, and expand the experimental application field

Inactive Publication Date: 2016-09-28
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a hydrofoil blade tip clearance and angle of attack adjustment system for water tunnel experiments to solve the problems that existing hydrofoil blade tip clearance and attack angle adjustment devices are independent of each other, complex structure, and high experiment cost, which can realize hydrofoil blade tip clearance and attack angle adjustment system. Quantitative Adjustment of Wing Angle of Attack and Blade Tip Clearance

Method used

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  • A system for adjusting the tip clearance and angle of attack of a hydrofoil in a water tunnel experiment
  • A system for adjusting the tip clearance and angle of attack of a hydrofoil in a water tunnel experiment
  • A system for adjusting the tip clearance and angle of attack of a hydrofoil in a water tunnel experiment

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Embodiment

[0034] like figure 1 As shown, the hydrofoil tip clearance and angle of attack adjustment system of the present invention consists of a water hole observation section 1, a fixed plate 3, a positioning nut 4, a support rod 5, a positioning block 6, a hydrofoil connecting rod 7, an angle of attack adjustment nut 8 and Composed of elastic sealing structure. like figure 2 As shown, the central part of the fixing plate 3 has a through hole. like image 3 As shown, the surface of the support rod 5 is threaded. like Figure 4 Shown, one end of the surface of the hydrofoil connecting rod 7 has no thread, and one end has thread. like Figure 5 As shown, the two ends and the center of the positioning block 6 are provided with through holes. Connection relationship: two fixed plates 3 are fixed on the observation section 1 of the water tunnel by riveting or welding at a certain distance; two support rods 5 pass through and are vertically fixed on the two fixed plates 3; two suppo...

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Abstract

The invention relates to a hydrofoil blade top gap and attack angle adjusting system for a water tunnel experiment and belongs to the technical field of water conservancy and hydropower engineering. The system is composed of a water tunnel observation section (1), fixing boards (3), locating nuts (4), supporting rods (5), a locating block (6), a hydrofoil connecting rod (7), an attack angle adjusting nut (8) and an elastic sealing structure. The two fixing boards (3) are spaced at a certain distance and fixed to a fixing face of the water tunnel observation section (1). The two supporting rods (5) are perpendicularly fixed to the two fixing boards (3) respectively, penetrate through through holes in the two ends of the locating block (6) and are located through the locating nuts (4). The smooth end of the hydrofoil connecting rod (7) penetrates through the fixing face of the water tunnel observation section (1) and is sealed through the elastic sealing structure and the threaded end of the water tunnel observation section (1) penetrates through the locating block (6) and is fixed through the attack angle adjusting nut (8). Compared with an existing system, the system is simple and compact in structure, capable of saving space, easy to move and detach, low in manufacturing cost and good in sealing performance.

Description

technical field [0001] The invention relates to a hydrofoil tip clearance and attack angle adjustment system for water tunnel experiments, and belongs to the technical fields of water conservancy and hydropower engineering and ocean ship engineering. Background technique [0002] The airfoil is the basic unit of the hydraulic machinery structure, and the research on the flow around the hydrofoil is of great significance to the study of the internal flow mechanism of the hydraulic machinery and the optimal design. [0003] In the transient process of propeller, turbo pump, hydraulic turbine start-up and shutdown, runaway, load increase and decrease, etc., the transient flow in the transient process will change the effective angle of attack of the lifting surface, and its internal flow is significantly different from the design condition. . Therefore, it is of great significance to understand the changes of hydrodynamic load and vibration of objects under non-design condition...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M10/00
Inventor 王国玉赵宇黄彪刘雷鸣
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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